Lepidium appelianum

Synonyms: Cardaria pubescens

Common names: hairy whitetop

Lepidium appelianum (hairy whitetop) is a perennial (family Brassicaceae) that develops an extensive system of deep vertical and horizontal roots that vigorously produce new shoots. It is scattered throughout California, but is most frequently seen in the Sacramento Valley, Great Basin, and southwestern region of the state.

Rating: Limited

Cal-IPC Resources

  • Plant Assessment Form - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.
  • Cal-IPC News - Our quarterly newsletter. Each issue is available as a pdf.
  • Cal-IPC Symposium Proceedings - Presentations and papers from our annual Symposium.
  • Don't Plant a Pest! - Select your region to find non-invasive alternatives to ornamental species. Also see our statewide brochure on trees.

    Other Resources

    • USDA PLANTS database -
      Federal database with information on identification and distribution, and links to websites in individual states.
    • Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from the UC Berkeley Jepson Herbarium.
    • CalFlora - Distribution information by county based on submitted observations and herbarium specimens.
    • Encycloweedia - Plants rated as noxious weeds by the California Department of Food and Agriculture.
    • CalPhotos - Images of plants taken mostly in California.

    Symposium Presentations

    • DiTomaso, J. M. (2005). Efficacy and safety of new herbicides on the horizon. California Invasive Plant Council Symposium 2005. Chico, CA.
    • Gerlach, J. D. (1997). How the west was lost: Reconstructing the invasion dynamics of yellow star-thistle and other plant invaders of western rangelands and natural areas. California Exotic Pest Plant Council Symposium '97. Concord, CA.

    Cal-IPC News Articles

    • None for this species.